Year,Value,Europe,Wind,Mar-May,(kph)
1940,12.785
1941,12.37
1942,12.429
1943,13.395
1944,12.128
1945,12.565
1946,12.107
1947,12.715
1948,12.814
1949,12.837
1950,12.561
1951,12.461
1952,12.089
1953,12.91
1954,12.092
1955,12.432
1956,12.128
1957,12.167
1958,12.484
1959,12.163
1960,12.051
1961,12.718
1962,12.552
1963,11.779
1964,11.412
1965,12.375
1966,12.246
1967,12.984
1968,13.156
1969,12.538
1970,12.681
1971,12.37
1972,12.515
1973,12.288
1974,11.892
1975,12.305
1976,12.135
1977,12.348
1978,12.075
1979,12.637
1980,12.093
1981,12.224
1982,12.288
1983,12.007
1984,11.959
1985,12.23
1986,12.429
1987,12.281
1988,12.308
1989,12.13
1990,13.026
1991,12.034
1992,12.854
1993,12.064
1994,13.072
1995,13.02
1996,12.034
1997,12.994
1998,12.773
1999,12.272
2000,12.643
2001,12.26
2002,12.25
2003,12.402
2004,12.01
2005,12.341
2006,12.058
2007,12.25
2008,12.329
2009,11.86
2010,11.897
2011,12.401
2012,12.366
2013,12.406
2014,12.68
2015,12.92
2016,11.715
2017,12.654
2018,12.344
2019,12.617
2020,13.077
2021,12.677
2022,12.409
2023,12.267
2024,12.164
2025,12.214